Office (OLE) / .DOC malware analysis — malicious · af15bb1f9d65f8cc

MALICIOUS

Office (OLE) / .DOC

200.9 KB Created: 2020-09-21 06:43:00 Authoring application: Microsoft Office Word

MD5: 0c01c00051482aa1e5b1fb3bcb625b3d SHA-1: 99e9f1a4037b6b679bcb2986bde56d245916ed59 SHA-256: af15bb1f9d65f8cc2177fb14ba280714dafa59cf57cb7bf7e66ab7524d372449

280 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1059.001 PowerShell T1204.002 Malicious File

The sample is a malicious OLE document containing a large VBA macro. The 'Document_Open' macro, along with 'CreateObject' and 'GetObject' calls, indicates an attempt to execute code upon opening. The ClamAV detection 'Doc.Downloader.Generic-9764468-0' strongly suggests the macro's purpose is to download and execute a second-stage payload. No specific family could be identified, but the techniques used are common for macro-based downloaders.

Heuristics 8

ClamAV: Doc.Downloader.Generic-9764468-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Downloader.Generic-9764468-0
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
GetObject call high OLE_VBA_GETOBJ

GetObject call
VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC

Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7169cbbf5de322d778ca9a77dc58bcf8bb22a6f6d4bfec64dbfa06bc63509b99`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	19229 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved macro source contains an auto-exec entry point and execution/download terms.

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